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Condensed Matter > Soft Condensed Matter

Title:
Disclination motion in hexatic and smectic-C films

Abstract: We present theoretical study of a single disclination motion in a thin free
standing hexatic (or smectic-C) film, driven by a large-scale inhomogeneity in
the bond (or director) angle. Back-flow effects and own dynamics of the bond
angle are included. We find the angle and hydrodynamic velocity distributions
around the moving disclination, what allows us to relate the disclination
velocity to the angle gradient far from the disclination. Different cases are
examined depending on the ratio of the rotational and shear viscosity
coefficients.